Vat dye.



.quinOn into its derivatives Specification of Letters Patent.

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VAT DYE,

'. Patented May is, rare.

No Drawing. Application filed May 12, 1909, Serial No. &95,475. Renewed March 18, 1910. serial No. 550,299.

To all whom it may concern."

Be it known that I, PAUL Tiionasonnw- SKI, doctor of philosophy,'che1nist, citizen of the German Empire, residing at Vohwi'nkehnear Elberfeld, Germany, have in -vented new and useful Improvements in Vat Dyestufi's, of which the following s a specification. My invention relates to the production of new ai'ithracene derivatives. They are ob tained by convertingan aminoanthrm eontainin sulr stituted benzoyl groups. The reaction .is carried out by' treating an aininoanthraquinone with a substituted earboxylic acid of the benzene series or a suitable derivative thereof. i

The new products are'after being. dried and pulverized colored powders practically insoluble in water; soluble in concentrated sulfuric acid with from a yellow to red to brown color. They yieldon treatment with hydrosulfite and caustic soda lye from orange to red to brown vats suitable for dyemg and printing the textile fiber from yellow to red to brown shades. They also form valuable lakes.

In order to illustratethe new process I can proceed as follows, the parts being by Weight-l0 parts of l-aminoanthraquinone are heated to 125 C. with 100 parts of nitrobenzene and 8 parts of salicylic acid. 7 parts of thionyl chlorid are then addedto the mixture heated to 125 C. The new condensation product crystallizes from the cooling liquid. Itv is ,filtered off, washed with alcohol and dried. It is soluble in pyridin with a yellow color, in concentrated sulfuric acid with an orange color. By treatment with hydrosulfite and NaOH a yellow-red vat is obtained which dyes cotton woolor silk greenish-yellow shades.

Other aminoanthraquinones may be used.

qualities are thus obtained,.'e. g. the condensation products ob tained from 1.5-diaminoanthraquinone and salicylic acid (dyes yellow), 'L5-diaminoanthraquinone and anlsic acid (dyes yellow- Products of similar orange), l-aminoanthraquinone and thiosalicylic acid (dyes yellow), 1.5-dia ninoanthraquinone and para-nitrobenzoyl chlorid (dyes yellow-brown) 1.fi-diaminoanthraqui- 5 none and meta-cyanobenzoic acid (dyes yel- (low), l.t-amino-oxyanthraquinone and ortho-chlorobenzoic acid (dyes brown).

1. The herein described new vat "dye stuli's of the anthrace'ne series which are aniinoanthraquinones containing substituted benzoyl groups which dyestutl's are, after being'di'ied and pulverized, colored powders practicall insolublev in water, soluble in concentraterl sulfuric acid with a yellow to red to brown color; giving from .orange to red to brown vats with hydrosulfite and caustic soda lye, which vats dye the textile fiber from yellow to red to brown shades, substantiall as described.

2. The herein escribednew vat dyestuif of the anthracene series which is the ortho oxy bcnzoyl l aminoanthraquinone, which dyestuil is,'aftcr being dried and pulverized, a yellow powder which .is soluble in pyridin with a yellow color; soluble in concentrated sulfuric acid with an orange color; giving a-yellow-red vat with. hydrosulfitc and caustic soda lye, which vat dyes the textile fiber beautiful greenish-yellow shades, substantially as described.-

In testimony whereof I have, hereunto set my hand in the witnesses.

. PAUL THOMASUHEWSKI. [1. s] Witnesses:

'- Orro KoNIG,

C. J. VVincn'r.

presence of two subscribing 

